US3351847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current-detecting apparatus
Assignee: Saab Bofors AB
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Filing: 1964-11-30
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Granted: 1967-11-07
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Expires: 1984-11-30
Abstract
No abstract record available.
Inventors
- 👤 Jansson Tore Lennart
- 👤 Holmstrom Sven Carl Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/02; F; F41; F41G; F41G7/00; F41G7/20; F41G7/30; F41G7/301; F41G7/305; F41G7/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
IN COMBINATION WITH MEANS FOR DETECTING A CURRENT COMPRISING A CURRENT DETECTOR CIRCUIT INCLUDING AN INPUT TERMINAL THROUGH WHICH CURRENT IS ADAPTED TO PASS AND A CONNECTING TERMINAL, AND A CURRENT SOURCE INCLUDING FIRST AND SECOND OUTER TERMINALS, ALL SAID TERMINALS BEING CONNECTED TO SAID CURRENT DETECTOR CIRCUIT FOR SUPPLYING OPERATING CURRENT THERETO, APPARATUS FOR MAINTAINING THE VOLTAGE DIFFERENCE BETWEEN THE CONNECTING AND INPUT TERMINALS OF SAID CURRENT DETECTOR CIRCUIT AT GREATER THAN A GIVEN MINIMUM VALUE, SAID APPARATUS COMPRISING A UNILATERAL CONDUCTING DEVICE CONNECTED BETWEEN SAID CONNECTING TERMINAL AND THE SECOND OUTER TERMINAL OF SAID CURRENT SOURCE, A CAPACITOR INCLUDING A FIRST TERMINAL CONNECTED TO SAID CONNECTING TERMINAL AND A SECOND TERMINAL, MEANS INCLUDING AN OUTPUT TERMINAL ADAPTED TO TRANSMIT A VOLTAGE PULSE WHEN THE VOLTAGE DIFFERENCE BETWEEN THE INPUT TERMINAL OF SAID CURRENT DETECTOR CIRCUIT AND THE SECOND TERMINAL OF SAID SOURCE OF CURRENT IS LESS THAN A PREDETERMINED VALUE, AND MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID LAST-NAMED MEANS TO THE SECOND TERMINAL OF SAID CAPACITOR TO CAUSE THE VOLTAGE AT SAID CONNECTING POINT TO CHANGE.
Claim 2
Dependent Claim
180 words
IN COMBINATION WITH MEANS FOR DETECTING A CURRENT COMPRISING A CURRENT DETECTOR CIRCUIT INCLUDING AN INPUT TERMINAL THROUGH WHICH CURRENT IS ADAPTED TO PASS AND A CONNECTING TERMINAL, AND A CURRENT SOURCE INCLUDING FIRST AND SECOND OUTER TERMINALS, ALL SAID TERMINALS BEING CONNECTED TO SAID CURRENT DETECTOR CIRCUIT FOR SUPPLYING OPERATING CURRENT THERETO, APPARATUS FOR MAINTAINING THE VOLTAGE DIFFERENCE BETWEEN THE CONNECTING AND INPUT TERMINALS OF SAID CURRENT DETECTOR CIRCUIT AT GREATER THAN A GIVEN MINIMUM VALUE, SAID APPARATUS COMPRISING A UNILATERAL CONDUCTING DEVICE CONNECTED BETWEEN SAID CONNECTING TERMINAL AND THE SECOND OUTER TERMINAL OF SAID CURRENT SOURCE, A CAPACITOR INCLUDING A FIRST TERMINAL CONNECTED TO SAID CONNECTING TERMINAL AND A SECOND TERMINAL, MEANS INCLUDING AN OUTPUT TERMINAL ADAPTED TO TRANSMIT A VOLTAGE PULSE WHEN THE VOLTAGE DIFFERENCE BETWEEN THE INPUT TERMINAL OF SAID CURRENT DETECTOR CIRCUIT AND THE SECOND TERMINAL OF SAID SOURCE OF CURRENT IS LESS THAN A PREDETERMINED VALUE, AND MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID LAST-NAMED MEANS TO THE SECOND TERMINAL OF SAID CAPACITOR TO CAUSE THE VOLTAGE AT SAID CONNECTING POINT TO CHANGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |